Design method for compression loaded NCF composites

Reference number
Coordinator GKN AEROSPACE SWEDEN AB
Funding from Vinnova SEK 2 504 000
Project duration November 2017 - December 2019
Status Ongoing
Venture National Aeronautical Research Program 7
Call 2017-02942-en

Purpose and goal

Here failure criteria and computational methods needed for reliable and efficient design of aero engine structural components made from textile composites are being developed. The complex shape of such components requires new lay-up strategies resulting in wavy plies causing reduced compressive performance. This research aims to investigate and model effects of interaction of waviness at different length scales on compressive strength of NCF composites.

Expected results and effects

In this project a graduate student is trained towards a doctoral degree. In addition the research is expected to result in a virtual design tool adapted for industrial use in the design of aero engine structures. The design method will also be made available to other industrial sectors, via Chalmers and Swerea SICOMP.

Planned approach and implementation

During the first part of the project effects of fibre bundle/ply undulation on compressive stiffness and strength have been studied and strength models considering the three-dimensional stress state present at, e.g. ply-drop regions, have been developed and validated. In this carry-on project we focus on the development and verification of a probabilistic design method, which considers effects of waviness on different length scales on the compressive strength of composite material structures.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.